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  <script>
    // 作业：数组中['老王', '老六', '老八', '雪糕老师'] 把老王和雪糕老师换个位置
    let arr = ['老王', '老六', '老八', '雪糕老师']
    const res=arr.reverse()
    let temp=arr[1]
    arr[1]=arr[2]
    arr[2]=temp
    console.log(res);

  </script>
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